Tunneling dynamics and periodic modulating of a two-component BECs in optical lattices
Kezhi Zhang, Jianjun Wang, Guorong Liu +1 more
摘要 研究了两组分玻色-爱因斯坦凝聚体(BECs)在一维光晶格中的隧穿动力学及周期调制效应. 在两模近似下，运用数值分析的方法, 讨论了两组分间相互作用对体系的隧穿动力学行为的影响. 进一步讨论了两组分间相互作用在周期调制下系统的动力学特性, 分析了随着调制振幅和频率的变化, 系统发生隧穿、不稳定和自俘获的区域分布, 发现在中低频调制下, 系统的隧穿动力学发生了明显的改变. 关键词: 两组分BECs / 光晶格 / 隧穿动力学 / 不规则振荡 Abstract The tunneling dynamics and periodic modulation effect of a two-component Bose-Einstein condensate in an one-dimensional optical lattice are investigated. By using the two-mode approximation, we study the influence of the interaction between two-component BECs on the tunnelling dynamics of the system numerically. The dynamic behavior of the system is investigated by adding a periodic modulation on the interaction between two-component atoms. We get the region for the onset of the tunneling, unstability and the self-trapping of the system with the changing modulation amplitude and frequency. We find that for the intermediate- and the low- frequency modulations, the dynamic behaviors of the system are dramatically different. Keywords: two-component BECs / optical lattice / tunneling dynamics / irregular oscillation 作者及机构信息 张科智, 王建军, 刘国荣, 薛具奎 1. 西北师范大学物理与电子工程学院，兰州 730070 基金项目: 国家自然科学基金(批准号：10774120,10975114),甘肃省自然科学基金(批准号: 3ZS051-A25-013) 和西北师范大学科技创新项目(批准号: NWNU-KJCXGC-03-17, NWNU-KJCXGC-03-48)资助的课题. Authors and contacts Zhang Ke-Zhi, Wang Jian-Jun, Liu Guo-Rong, Xue Ju-Kui 1. 西北师范大学物理与电子工程学院，兰州 730070 参考文献 [1] ［1］Anderson B P, Kasevich M A 1998 Science 282 1686 [2] ［2］Bronski J C, Carr L D, Deconinck B, Kutz J N 2001 Phys. Rev. Lett. 86 1402 [3] ［3］Choi D I,Niu Q 1999 Phys. Rev. Lett. 82 2022 [4] ［4］Morsch O, Muller J H, Cristiani M, Ciampini D, Arimondo E 2001 Phys. Rev. Lett. 87 140402 [5] ［5］Wu B, Niu Q 2000 Phys. Rev. A 61 023402 [6] ［6］Wu B, Diener R B, Niu Q 2002 Phys. Rev. A 65 025601 [7] ［7］Liu J, Fu L B, Ou B Y, Chen S G, Dae-II Choi, Wu B, Niu Q 2002 Phys. Rev. A 66 023404 [8] ［8］Zhang A X, Xue J K 2007 Phys. Rev. A 75 013624 [9] ［9］Xue J K 2005 Phys. Lett. A 341 527 [10] ］Diakonov D, Jensen L M, Pethick C J 2002 Phys. Rev. A 66 013064 [11] ］Mueller E J, 2002 Phys. Rev. A 66 063603 [12] ］Fallni L,Sarlo L D, Lye J E, Modugno M, Saers R,Fort C, Inyuscio M 2004 Phys. Rev. Lett. 93 140406 [13] ］Wu Y, Yang X X 2007 Phys. Rev. Lett. 98 013601 [14] Wu Y, Yang X X 2003 Phys. Rev. A 68 013608 [15] ］Wu B, Niu Q 2003 New J. Phys. 5 104 Liu B, Fu L B, Yang S P, Liu J 2007 Phys. Rev. A 75 033601 [16] ］Wang G F,Ye D F, Fu L B, Chen X Z, Liu J 2006 Phys. Rev. A 74 033414 [17] ］Xue J K, Zhang A X 2008 Phys. Rev. Lett. 101 180401 [18] ］Xue J K, Zhang A X, Liu J 2008 Phys. Rev. A 77 013602 [19] ］Ma Y, Fu L B， Yang Zh A ，Liu J 2006 Acta Phys. Sin. 55 5623 (in Chinese) ［马云、傅立斌、杨志安、刘杰 2006 物理学报 55 5623］ [20] ］Wei X F, Tang R A, Yong W M, Xue J K 2008 Chin. Phys. Lett. 25 1564 [21] ］Fang Y C, Yang Z A, Yang L Y 2008 Acta Phys. Sin. 57 0661 (in chinese) ［房永翠、杨志安、杨丽云 2008 物理学报 57 0661］ [22] ］Ziegler K 2003 Phys. Rev. A 68 053602 [23] ］Chen G H, Wu Y S 2003 Phys. Rev. A 67 013606 [24] ］Wang G F, Fu L B, Liu J 2006 Phys. Rev. A 73 013619 Wang G F, Fu L B, Zhao H, Liu J 2005 Acta Phys. Sin. 54 5003(in chinese) ［王冠芳、傅立斌、赵鸿、刘杰 2005 物理学报 54 5003］ [25] ］Yan K Z,Tan W H 1999 Acta Phys. Sin. 48 1185 (in Chinese) ［闫珂柱、谭维翰 1999 物理学报 48 1185 ］Yan K Z,Tan W H 2000 Acta Phys. Sin. 49 1909 (in Chinese) ［闫珂柱、谭维翰 2000 物理学报 49 1909 ］ [26] ］Chen H J, Li H C, Xue J K 2008 Commun. Theor. Phys. 49 1519 Chen H J, Xue J K 2008 Acta Phys. Sin. 57 3962 (in chinese) ［陈海军、薛具奎 2008 物理学报 57 3962］ [27] ］Xiao Y F,Wang D L, Wang F J, Yan X H 2006 Acta Phys. Sin. 55 0547 (in Chinese) ［肖宇飞、王登龙、王凤姣、闫晓红 2006 物理学报 55 0547］ 施引文献
Acta Physica Sinica•Jan 1, 2010•0 citations